[U-Boot] [BUG] qemu-x86_64_defconfig fails with panic("TSC frequency is ZERO");

Hello Bin, Simon,

sometimes qemu-x86_64_defconfig fails with panic("TSC frequency is ZERO") in drivers/timer/tsc_timer.c.

The system may hang in an endless reboot loop with this error or recover after reboot.

Do we need to panic? Or could we use some default value?

Qemu version used for testing: 2.8.1.

Best regards

Heinrich